fix(chat): copy workspace resources as portable links

[j15z]

Summary

Copying an assistant message now serializes rendered workspace-resource tags as portable Sim Markdown links ([label](sim:type/id)). Pasting those links back into Sim reconstructs the corresponding file, table, or workflow chip instead of losing the resource reference.

Files that only have a path are resolved from the workspace-file cache. If a file is not cached, the copy operation refreshes that query while preserving clipboard user activation; if it still cannot be resolved, the visible label is copied as safe plain text. Portable chip labels also escape and restore Markdown-sensitive characters.

This is the second PR in the stack and depends on #6903, which provides orchestrator-only Markdown copying. There are no visual changes.

Type of Change

• Bug fix
• New feature
• Breaking change
• Documentation
• Other: ___________

Testing

• 9 copyable-markdown tests passed for resource serialization, spacing, file resolution, refresh, and fallback behavior
• 3 use-copy-to-clipboard tests passed for immediate, deferred, and fallback clipboard writes
• bun run type-check passed across all 26 packages
• bun run lint:check passed across all 26 packages
• API validation, import specifier, monorepo boundary, React Query, client boundary, and tool-registry boundary checks passed

Reviewers should focus on escaped resource labels, path-only files that require a copy-time metadata refresh, and the plain-text fallback for unresolved files.

Checklist

• Code follows project style guidelines
• Self-reviewed my changes
• Tests added/updated and passing
• No new warnings introduced
• I confirm that I have read and agree to the terms outlined in the Contributor License Agreement (CLA)

Screenshots/Videos

Not applicable. The rendered resource chips are unchanged; this PR changes only their clipboard representation.

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1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
docs	Skipped		Aug 22, 2026 11:57pm

[cursor]

PR Summary

Medium Risk
Touches clipboard write behavior and resource-id resolution on copy. Wrong IDs or failed fallbacks could paste broken mentions, but the change is client-only and unresolved files degrade to plain text.

Overview
Copying a chat message now serializes workspace-resource chips as portable [label](sim:kind/id) Markdown so paste reconstructs the same file/table/workflow mention.

Unresolved files stay plain text (never a broken link). If the file list is stale, copy starts immediately with that fallback and, when ClipboardItem is available, refreshes workspace files before writing the real sim:file/… link.

Chip labels with [ / ] / \ are escaped on serialize and unescaped on parse. useCopyToClipboard now accepts deferred clipboard content so the async refresh still happens under user activation.

^{Reviewed by Cursor Bugbot for commit e7ffc07. Bugbot is set up for automated code reviews on this repo. Configure here.}

[greptile-apps]

Greptile Summary

The PR makes copied assistant messages preserve workspace resources as portable sim: Markdown links and centralizes delimiter-safe encoding for links shared by chat chips and rich-markdown mentions.

• Adds workspace-resource resolution and deferred file-metadata refresh during message copy.
• Extends the shared clipboard hook to support promise-backed clipboard content with an immediate fallback.
• Consolidates sim: link encoding, decoding, and Markdown-label escaping.
• Wires workspace identity and file metadata into both full-page and workflow-panel chat surfaces.
• Adds coverage for resource copying, encoded identifiers, mention round trips, and deferred clipboard writes.

Confidence Score: 5/5

The PR appears safe to merge, with no concrete changed-code failure or security issue identified.

The portable-link codec round-trips encoded identifiers consistently, unresolved file metadata has an explicit refresh and plain-text fallback path, and both chat surfaces provide the workspace identity needed by the copy flow.

Important Files Changed

Filename	Overview
apps/sim/app/workspace/[workspaceId]/home/components/mothership-chat/copyable-markdown.ts	Resolves structured workspace-resource tags into portable links and defers copying when file metadata must be refreshed.
packages/emcn/src/hooks/use-copy-to-clipboard.ts	Adds a deferred clipboard-content contract while preserving immediate string-copy behavior and fallback support.
apps/sim/lib/copilot/sim-link.ts	Centralizes encoding and decoding of portable resource identifiers and Markdown labels.
apps/sim/app/workspace/[workspaceId]/home/components/user-input/components/chip-clipboard-codec.ts	Adopts the shared link codec so copied and pasted chips safely round-trip delimiter-bearing identifiers.
apps/sim/app/workspace/[workspaceId]/files/components/file-viewer/rich-markdown-editor/mention/mention-node.ts	Uses the shared codec for rich-editor mention parsing, rendering, and input-rule conversion.
apps/sim/app/workspace/[workspaceId]/home/components/mothership-chat/mothership-chat.tsx	Supplies workspace metadata and query-backed refresh callbacks to assistant-message copy actions.

Sequence Diagram

sequenceDiagram
  participant U as User
  participant A as MessageActions
  participant S as Resource serializer
  participant Q as Workspace-file query
  participant C as Clipboard API
  U->>A: Click Copy
  A->>S: Prepare message Markdown
  alt All resources resolve
    S-->>A: Portable sim: Markdown
    A->>C: writeText(markdown)
  else File metadata is unresolved
    S-->>A: Deferred content + plain-text fallback
    A->>C: write ClipboardItem immediately
    C->>Q: Resolve promised text
    Q-->>C: Refreshed portable Markdown
  end

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